1. Size: 18" * 79"/45cm*200cm2. Self-adhesive and erasable chalkboard Can be quickly and easily applied to any clean， flat surface. Just work like a real chalkboard! [Cleaning cloth is included.]3. Customizeable With an area of 79" x 18" [200 x 45 cm]， you can cut them to your desired size which can be used separately or combined for a large chalkboard writing surface.4. Easy on & easy off Each 79" X 18" chalk board wall sticker is made of black Polyvinyl Chloride (PVC). Removal is fast， easy and residue-free. Just peel it off the surface when you're finished.5. Long-lasting and with no air bubbles or shifting.6. Perfect for writing thoughts/brainstorming， leaving messages and creating art no matter where you are in the building.Package:1 x wall sticker